Nak, I disagree....
Without one the compressor cycles a lot. It'll shut off in between tires, not be running while you are hooking up air hoses, not filling a tank while you are heading to the air up spot, and not holding air afterwards.
Using one gives a nice buffer and gives a huge head start when you pull into the air up spot. also, when you are chatting while switching from one tire to another, it is filling.